//
//  VisitorLoginView.swift
//  Weibo
//
//  Created by mac on 15/12/14.
//  Copyright © 2015年 mac. All rights reserved.
//

import UIKit

//定义协议
@objc protocol VisitorLoginViewDelegate:NSObjectProtocol{

    //声明协议方法
    //用户将要登录
    //optional 是OC中的关键字
    optional func userWillLogin()
    //用户将要注册
    func userWillRegister()
}

class VisitorLoginView: UIView {

    //声明代理  代理要使用 weak 属性关键字
    //swift 属性默认都是strong 代理同样也需要使用weak
    weak var visitroViewDelegate:VisitorLoginViewDelegate?
    //对外提供设置方可视图信息的方法
    func setupInfo(tipText:String,imageName:String?){
    
        tipLabel.text = tipText
        if let name = imageName{
        //不是首页
            circleView.image = UIImage(named: name)
            //隐藏大房子
            largeIcon.hidden = true
            //将circleView移动到视图最顶层
            bringSubviewToFront(circleView)
        }else{
        
            //就是首页
            //就开始做动画
            startAnimation()
        }
    }
    
    private func startAnimation(){
        let anim = CABasicAnimation(keyPath:"transform.rotation")
        
        //设置动画属性
        anim.repeatCount = MAXFLOAT
        anim.duration = 20.0
        anim.toValue = 2 * M_PI
        //当动画完毕或者页面失去活跃状态  动画不溢出图层
        anim.removedOnCompletion = false
        //添加动画
        circleView.layer.addAnimation(anim, forKey: nil)
    }
    
    override init(frame: CGRect) {
        //调用super.init
        super.init(frame: frame)
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    //设置所有子视图
    private func setupUI(){
    
        addSubview(largeIcon)
        addSubview(backView)
        addSubview(circleView)
        addSubview(tipLabel)
        addSubview(registerBtn)
        addSubview(loginBtn)
        
        //使用自动布局
//        NSLayoutConstraint   VFL
        /*
        参数介绍:返回一个自动布局约束对象
                1.item 需要添加约束的对象
                2.attribute 添加约束的对象的需要约束的属性
                3.relatedBy 约束的关系  一般使用 equal 表示精准约束
                4.toItem 相对约束的对象
                5.attribute 相对约束的兑现的属性
                6.multiplier  乘积值  一般为 1
                7.constant  约束值
        
        View1.attr1 =
        view.attr2 * multiplier + constant
        自动布局原则:先固定好一个视图  其他所有视图 都应该相对于一个已经固定好的视图添加约束
        */
//        NSLayoutConstraint(item: <#T##AnyObject#>, attribute: <#T##NSLayoutAttribute#>, relatedBy: <#T##NSLayoutRelation#>, toItem: <#T##AnyObject?#>, attribute: <#T##NSLayoutAttribute#>, multiplier: <#T##CGFloat#>, constant: <#T##CGFloat#>))
        
        //约束需要添加到父视图
        //在使用手码添加约束 需要屏蔽frame布局
        largeIcon.translatesAutoresizingMaskIntoConstraints = false
        //largeIcon水平方向的自动布局约束
        addConstraint(NSLayoutConstraint(item: largeIcon, attribute: .CenterX, relatedBy: .Equal, toItem: self, attribute: .CenterX, multiplier: 1, constant: 0))
        //垂直方向的自动布约束局
        addConstraint(NSLayoutConstraint(item: largeIcon, attribute: .CenterY, relatedBy: .Equal, toItem: self, attribute: .CenterY, multiplier: 1, constant: -60))
        
        //添加圆圈的约束
        addConstraint(NSLayoutConstraint(item: circleView, attribute: .CenterX, relatedBy: .Equal, toItem: largeIcon, attribute: .CenterX, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: circleView, attribute: .CenterY, relatedBy: .Equal, toItem: largeIcon, attribute: .CenterY, multiplier: 1, constant: 0))
        
        //tipLable自动布局
        //水平方向的自动布局约束
        addConstraint(NSLayoutConstraint(item: tipLabel, attribute: .CenterX, relatedBy: .Equal, toItem: circleView, attribute: .CenterX, multiplier: 1, constant: 0))
        //垂直方向的自动布约束局
        addConstraint(NSLayoutConstraint(item: tipLabel, attribute: .Top, relatedBy: .Equal, toItem: circleView, attribute: .Bottom , multiplier: 1, constant: -16))
        
        addConstraint(NSLayoutConstraint(item: tipLabel, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 230))
        addConstraint(NSLayoutConstraint(item: tipLabel, attribute: .Height , relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 40))
        
        //按钮的约束
        addConstraint(NSLayoutConstraint(item: loginBtn, attribute: .Left , relatedBy: .Equal, toItem: tipLabel, attribute: .Left , multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: loginBtn, attribute: .Top , relatedBy: .Equal, toItem: tipLabel, attribute: .Bottom , multiplier: 1, constant: 20))
        
        addConstraint(NSLayoutConstraint(item: loginBtn, attribute: .Width , relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 35))
        
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Right, relatedBy: .Equal, toItem: tipLabel
            , attribute: .Right, multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Top , relatedBy: .Equal, toItem: tipLabel, attribute: .Bottom, multiplier: 1, constant: 20))
        
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 100))
        addConstraint(NSLayoutConstraint(item: registerBtn, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 35))

        //设置背景视图的约束 可视化的布局语言
        //oc中可选项 一般使用按位或 枚举选项  swift中直接指定数组
        //metrics:约束数值字典[String: 数值]
        addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-0-[backView]-0-|", options: [], metrics: nil, views: ["backView":backView]))
        
        addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-0-[backView]-(35)-[regBtn]", options: [], metrics: nil, views: ["backView":backView,"regBtn":registerBtn]))
        
        //设置视图的背景颜色
//        UIColor(white: <#T##CGFloat#>, alpha: <#T##CGFloat#>)  设置灰度颜色
        backgroundColor = UIColor(white: 0.93, alpha: 1)
        
        //添加点击事件
        registerBtn.addTarget(self, action: "registerBtnDidClick", forControlEvents: .TouchUpInside)
        loginBtn.addTarget(self, action: "loginBtnDidClick", forControlEvents: .TouchUpInside)

    }
    
    //MARK: 按钮的监听事件
    @objc private func registerBtnDidClick(){
    
        //代理调用协议方法  如果为 nil 就不会执行该方法
        visitroViewDelegate?.userWillRegister()
    }
    
    @objc private func loginBtnDidClick(){
    
        //判断代理是否为空 && 是否响应方法 userWillLogin? 表示的是判断是否可以响应方法
        visitroViewDelegate?.userWillLogin?()
    }
    
    //懒加载所有的子视图
    private lazy var backView:UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_mask_smallicon"))
    private lazy var largeIcon:UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_house"))
    private lazy var circleView:UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_smallicon"))
    
    private lazy var tipLabel: UILabel = {
        let l = UILabel()
        
        l.text = "关注一些人，回这里看看有什么惊喜"
        l.textColor = UIColor.darkGrayColor()
        l.textAlignment = .Center
        l.font = UIFont.systemFontOfSize(14)
        l.numberOfLines = 0
        l.sizeToFit()
        
        return l
    }()
    
    private lazy var registerBtn: UIButton = {
    
        let btn = UIButton()
        btn.setBackgroundImage(UIImage(named: "common_button_white_disable"), forState: UIControlState.Normal)
        btn.setTitle("注册", forState: .Normal)
        btn.titleLabel?.font = UIFont.systemFontOfSize(15)
        btn.setTitleColor(themeColor, forState: .Normal)
        btn.sizeToFit()
        return btn
    }()
    
    private lazy var loginBtn:UIButton = {
    
        let btn = UIButton()
        btn.setBackgroundImage(UIImage(named: "common_button_white_disable"), forState: .Normal)
        btn.setTitle("登录", forState: .Normal)
        btn.titleLabel?.font = UIFont.systemFontOfSize(15)
        btn.setTitleColor(UIColor.darkGrayColor(), forState: .Normal)
        btn.sizeToFit()
        return btn
    }()
    
}
